CN216788847U - Synchronous control system of double-lifting-point hydraulic hoist - Google Patents
Synchronous control system of double-lifting-point hydraulic hoist Download PDFInfo
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- CN216788847U CN216788847U CN202220356388.9U CN202220356388U CN216788847U CN 216788847 U CN216788847 U CN 216788847U CN 202220356388 U CN202220356388 U CN 202220356388U CN 216788847 U CN216788847 U CN 216788847U
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Abstract
A synchronous control system of a double-lifting-point hydraulic hoist relates to the field of hydraulic engineering and comprises an oil tank, an oil pump, two hydraulic cylinders, a flow dividing and collecting valve and two three-position four-way electromagnetic valves, wherein first working oil ports of the two three-position four-way electromagnetic valves are respectively connected with rodless cavities of the two hydraulic cylinders and are connected with a proportional control valve in a bypass mode, and the proportional control valve is connected with the oil tank through a throttle valve; a second working oil port of the three-position four-way electromagnetic valve is connected with a rod cavity of the hydraulic cylinder; the two hydraulic cylinders are a left hydraulic cylinder and a right hydraulic cylinder, the two three-position four-way electromagnetic valves are a left three-position four-way electromagnetic valve and a right three-position four-way electromagnetic valve, a second working oil port of the left three-position four-way electromagnetic valve is connected with a first check valve and a first stroke valve, and the first stroke valve is connected with a rod cavity of the right hydraulic cylinder; and a second working oil port of the right three-position four-way electromagnetic valve is connected with a second one-way valve and a second stroke valve, and the second stroke valve is connected with a rod cavity of the left hydraulic cylinder. The utility model can improve the synchronous operation precision of the two hydraulic cylinders.
Description
Technical Field
The utility model relates to the field of hydraulic engineering, in particular to a control system for synchronously lifting a gate.
Background
The hydraulic hoist has a series of advantages of high transmission efficiency, stable operation, large starting and stopping capacity, compact structure, light dead weight, simplified hydraulic structure, stepless speed regulation, convenience for field operation and remote centralized control and the like, and is widely used in hydraulic engineering instead of a winch hoist gradually. Although the gate of the hydraulic hoist with double hoisting points has larger spatial rigidity, synchronous deviation always exists in the operation process. The hydraulic hoist with double hoisting points is characterized in that the two sides of the gate are respectively connected with a hydraulic hoist system, and the gate blocking phenomenon can occur due to overlarge synchronous deviation of two hydraulic cylinders in the hoist process, and the gate sealing failure is caused due to serious abrasion of a gate water-stopping rubber, so that the gate hoist safety is influenced. Therefore, from the aspects of the safety of the gate and the benefit of engineering, higher requirements are provided for the operation synchronization precision of the two hydraulic cylinders in the opening and closing process of the gate, and the requirements can not be met by using the rigid synchronization of the gate, so that the operation synchronization precision of the two hydraulic cylinders is improved by adopting a synchronization loop in a hydraulic control system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a synchronous control system of a double-lifting-point hydraulic hoist with good synchronization performance.
The purpose of the utility model is realized as follows: the synchronous control system of the double-lifting-point hydraulic hoist comprises an oil tank, an oil pump and two hydraulic cylinders, wherein an oil inlet of the oil pump is connected with the oil tank, displacement sensors are respectively connected to the two hydraulic cylinders, the synchronous control system also comprises a flow dividing and collecting valve and two three-position four-way electromagnetic valves, an oil inlet of the flow dividing and collecting valve is connected with an oil outlet of the oil pump, oil inlets of the two three-position four-way electromagnetic valves are respectively connected with two oil outlets of the flow dividing and collecting valve, and oil return ports of the two three-position four-way electromagnetic valves are respectively connected with the oil tank; the first working oil ports of the two three-position four-way electromagnetic valves are respectively connected with the rodless cavities of the two hydraulic cylinders, the oil inlet of the proportional control valve is connected to the side of the oil path connecting the first working oil ports of the three-position four-way electromagnetic valves and the rodless cavities of the hydraulic cylinders, the oil outlet of the proportional control valve is connected with the throttle valve, and the oil outlet of the throttle valve is connected with the oil tank; the two hydraulic cylinders are a left hydraulic cylinder and a right hydraulic cylinder, the two three-position four-way solenoid valves are a left three-position four-way solenoid valve and a right three-position four-way solenoid valve, a second working oil port of the left three-position four-way solenoid valve is connected with a rod cavity of the left hydraulic cylinder, and a second working oil port of the right three-position four-way solenoid valve is connected with a rod cavity of the right hydraulic cylinder; the second working oil port of the left three-position four-way electromagnetic valve is also connected with a first one-way valve, the first one-way valve is connected with a first stroke valve, and the first stroke valve is connected with the rod cavity of the right hydraulic cylinder; and a second working oil port of the right three-position four-way electromagnetic valve is also connected with a second one-way valve, the second one-way valve is connected with a second stroke valve, and the second stroke valve is connected with a rod cavity of the left hydraulic cylinder.
The oil return ports of the two three-position four-way electromagnetic valves are connected in parallel and then connected with a back pressure valve, and the back pressure valve is connected with an oil tank.
The oil pump of the utility model is a unidirectional quantitative hydraulic pump.
The oil pump of the utility model has two oil pumps, the oil inlet of each oil pump is connected with the oil tank, and the oil outlets of the two oil pumps are connected in parallel and then connected with the flow dividing and collecting valve.
Through the design, the running synchronization precision of the two hydraulic cylinders can be improved.
Drawings
Fig. 1 is a control schematic of the present invention.
Detailed Description
As shown in fig. 1, the synchronous control system of the double-hanging-point hydraulic hoist comprises an oil tank 1, two oil pumps 2, a left hydraulic cylinder 13 and a right hydraulic chamber 8, wherein the left hydraulic cylinder 13 and the right hydraulic chamber 8 are respectively connected with a displacement sensor 12, oil inlets of the two oil pumps 2 are both connected with the oil tank 1, the two oil pumps 2 are respectively driven by a motor, one oil pump is used as a spare oil pump, the oil pumps 2 are unidirectional quantitative hydraulic pumps, and oil outlets of the two oil pumps 2 are connected in parallel and then connected with a flow dividing and collecting valve 17.
The synchronous control system also comprises a left three-position four-way electromagnetic valve 16 and a right three-position four-way electromagnetic valve 4, wherein an oil inlet of the left three-position four-way electromagnetic valve 16 is connected with one oil outlet of the flow distributing and collecting valve 17, and an oil inlet of the right three-position four-way electromagnetic valve 4 is connected with the other oil outlet of the flow distributing and collecting valve 17. The oil return ports of the left three-position four-way electromagnetic valve 16 and the right three-position four-way electromagnetic valve 4 are connected in parallel and then connected with the back pressure valve 3, and the back pressure valve 3 is connected with the oil tank 1.
The first working oil port of the left three-position four-way electromagnetic valve 16 is connected with the rodless cavity of the left hydraulic cylinder 13, the oil inlet of the left proportional control valve 15 is connected to the side of the oil path where the first working oil port of the left three-position four-way electromagnetic valve 16 is connected with the rodless cavity of the left hydraulic cylinder 13, the oil outlet of the left proportional control valve 15 is connected with the left throttle valve 14, and the oil outlet of the left throttle valve 14 is connected with the oil tank 1. The first working oil port of the right three-position four-way electromagnetic valve 4 is connected with the rodless cavity of the right hydraulic cylinder 8, the oil inlet of the right proportional control valve 6 is connected to the side of the oil path where the first working oil port of the right three-position four-way electromagnetic valve 4 is connected with the rodless cavity of the right hydraulic cylinder 8, the oil outlet of the right proportional control valve 6 is connected with the right throttle valve 5, and the oil outlet of the right throttle valve 5 is connected with the oil tank 1.
The second working oil port of the left three-position four-way solenoid valve 16 is connected with the rod cavity of the left hydraulic cylinder 13, and the second working oil port of the right three-position four-way solenoid valve 4 is connected with the rod cavity of the right hydraulic cylinder 8. The second working oil port of the left three-position four-way electromagnetic valve 16 is also connected with a first one-way valve 9, the oil outlet of the first one-way valve 9 is connected with a first stroke valve 7, and the first stroke valve 7 is connected with the rod cavity of the right hydraulic cylinder 8. And a second working oil port of the right three-position four-way electromagnetic valve 4 is also connected with a second one-way valve 10, an oil outlet of the second one-way valve 10 is connected with a second stroke valve 11, and the second stroke valve 11 is connected with a rod cavity of a left hydraulic cylinder 13.
The synchronous control principle is as follows: when the two oil cylinders are asynchronous (for example, the left hydraulic cylinder is fast and the right hydraulic cylinder is slow), the hydraulic cylinders stretch out, the left proportional control valve is controlled to be powered on, a part of pressure oil of a first working oil port of the left three-position four-way electromagnetic valve enters the oil tank from the left proportional control valve, and the oil quantity entering a rodless cavity of the left hydraulic cylinder is reduced; and meanwhile, the second stroke valve is controlled to be opened, and part of oil in the rod cavity of the right hydraulic cylinder is conveyed to a second working oil port of the left three-position four-way electromagnetic valve from the second one-way valve and the second stroke valve for returning. When the hydraulic cylinder retracts, the right proportional control valve is controlled to be electrified, part of pressure oil of the rodless cavity of the right hydraulic cylinder enters the oil tank from the right proportional control valve, and oil return of the rodless cavity of the right hydraulic cylinder is accelerated; and meanwhile, the first stroke valve is controlled to be opened, and part of pressure oil of a second working oil port of the left three-position four-way electromagnetic valve is conveyed to a rod cavity of the right hydraulic cylinder from the first check valve and the first stroke valve. No matter the hydraulic cylinder is extended or retracted, the flow of the rod cavities of the two hydraulic cylinders is equal, and the flow of the rodless cavities of the two hydraulic cylinders is equal, so that the effect of automatically adjusting the two oil cylinders to be synchronous is achieved.
Claims (4)
1. Synchronous control system of two hoisting point hydraulic hoist, including oil tank, oil pump and two pneumatic cylinders, the oil inlet of oil pump links to each other characterized by with the oil tank: the synchronous control system also comprises a flow distributing and collecting valve and two three-position four-way electromagnetic valves, wherein the oil inlet of the flow distributing and collecting valve is connected with the oil outlet of the oil pump, the oil inlets of the two three-position four-way electromagnetic valves are respectively connected with the two oil outlets of the flow distributing and collecting valve, and the oil return ports of the two three-position four-way electromagnetic valves are respectively connected with an oil tank; the first working oil ports of the two three-position four-way electromagnetic valves are respectively connected with the rodless cavities of the two hydraulic cylinders, the oil inlet of the proportional control valve is connected to the side of the oil path connecting the first working oil ports of the three-position four-way electromagnetic valves and the rodless cavities of the hydraulic cylinders, the oil outlet of the proportional control valve is connected with the throttle valve, and the oil outlet of the throttle valve is connected with the oil tank; the two hydraulic cylinders are a left hydraulic cylinder and a right hydraulic cylinder, the two three-position four-way solenoid valves are a left three-position four-way solenoid valve and a right three-position four-way solenoid valve, a second working oil port of the left three-position four-way solenoid valve is connected with a rod cavity of the left hydraulic cylinder, and a second working oil port of the right three-position four-way solenoid valve is connected with a rod cavity of the right hydraulic cylinder; the second working oil port of the left three-position four-way electromagnetic valve is also connected with a first one-way valve, the first one-way valve is connected with a first stroke valve, and the first stroke valve is connected with the rod cavity of the right hydraulic cylinder; and a second working oil port of the right three-position four-way electromagnetic valve is also connected with a second one-way valve, the second one-way valve is connected with a second stroke valve, and the second stroke valve is connected with a rod cavity of the left hydraulic cylinder.
2. The synchronous control system of the double-lifting-point hydraulic hoist as claimed in claim 1, characterized in that: and oil return ports of the two three-position four-way electromagnetic valves are connected in parallel and then connected with a back pressure valve, and the back pressure valve is connected with an oil tank.
3. The synchronous control system of the double-lifting-point hydraulic hoist as claimed in claim 1, characterized in that: the oil pump is a unidirectional quantitative hydraulic pump.
4. The synchronous control system of the double-lifting-point hydraulic hoist as claimed in claim 3, characterized in that: the oil pump has two, and the oil inlet of every oil pump all links to each other with the oil tank, and the oil-out of two oil pumps links to each other with the reposition of redundant personnel collecting valve after connecting in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220356388.9U CN216788847U (en) | 2022-02-22 | 2022-02-22 | Synchronous control system of double-lifting-point hydraulic hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220356388.9U CN216788847U (en) | 2022-02-22 | 2022-02-22 | Synchronous control system of double-lifting-point hydraulic hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216788847U true CN216788847U (en) | 2022-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220356388.9U Active CN216788847U (en) | 2022-02-22 | 2022-02-22 | Synchronous control system of double-lifting-point hydraulic hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216788847U (en) |
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2022
- 2022-02-22 CN CN202220356388.9U patent/CN216788847U/en active Active
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